Furnace for burning fine fuel.



' u. 70o,|9a. I Patented may 2o, 1902.l

R. HERZBEHG. FURNACE FUR BURNING FINE FUEL.

(No Model.)

THE Noms versus co., Pauw-uma., wAsNmsroN. D. c.

UNITED STATES PATENT OFFICE.

RICHARD I'IERZBERG., O F STETTIN, GERMANY.

FURNACE `FOR BURN-ING FINE FUEL.

SPECIFICATION'forming partof Letters Patent No. 700,198, dated May 20, 1902.

' Applicatie@ inea october 25, 1901. saranno. 79.906. (No moana To all whom it may concern: n

Be it known that LRICHARD HERZBERG, en-

` gineer, a subject of the Emperorof Germany,

residing at Stettin, Germany, have invented certain new and useful Improvementsin Furnaces forBurning Fine Fuehof which the folf lowing is a specification.

The object of my invention is to provide a furnace for burning pulverizedl or fine fuel, so constructed as to feed the fuel evenly to the grate, to utilize a maximum amount of the heat produced, and to prevent waste.

In carrying out my invention I form a combu stion-chamber, preferably in thick walls of masonry, and so arrange pipes for circulating water or steam in the combustion-chamber as to cause the fuel fed into the combustionchamber at the top to be evenly distributed on a grate or into the iir'e. Preferably the ypipes are made to incase the combustion-- chamber and tov also extend transversely across it, so as to divide the entering fuel into a numberof streams to be deposited'upon the grate, as before stated. f

In the accompanying drawings, Figure 1 shows a vertical transverse section througha furnace embodying my improvements, and Fig. 2 shows a vertical transverse section of' the same atright angles to that shown in" Fig. l.

The combustion-chamber A is preferably formed in thick walls of masonry B.y The grate C is located at the bottomofthe combustion-chamber and over an ash-pit' D. The fuel is fed from ahopper E .through a chute F to the upper end of the combustion-chamber, a rotary feeding device G being preferably employed to feed the fuel in small quantities at regular intervals. The device `G may be operated in any suitable way. The walls of masonry are preferably provided with passages I, through which air may circulate and which will prevent the radiation of heat. Air may be supplied tothe grate by means of a pipe J, having a rose K.` v

K indicates 'a door through-which access may be had to they grate.

Within the combustion-chamber are arranged alnumber of coils of pipe adapted to convey steam 'or water. enters at L and is then coiled around inside the combustion-chamber, so as to incase it,

the convolutions of the pipe being close to- Preferably the pipe n gether, as indicated. 'lhe pipe is then coiled back and forth transverselyacross thecombustionphamber, sov as to traverse all por- `tions thereof, leaving space,however, between the coils for thefuel to be supplied. After traversing the combustion-chamber'the pipe 'passes out at M.

The apparatus may beused forheating 'water tol supply hot water,or it maybe used Vtop-produce steam.

It is not absolutely necessarythat the pipes should be arranged horizontally, as they maybe arranged obliquely; but they should be so arrangedthat the fuel passing down from the chute F shall come in contact with the pipes and be divided into a number of streams, so that it shallbe supplied evenly'to the grate.

` I claimas my invention` l. A furnace for .burning fine fuel comprising a combustion-chamber having a feedopenngat the top, and pipes crossing the combustion-chamber at different levels below the feed-opening, and also incasing the combustion-chamber and the pipes which cross iti 2. Afurnace for burning ne fuel `comprising a combustion-chamber having a contracted upper end, a grate placedv ina con-y :tracted chamber below the combustion-chamber, a feedhopper for feeding fine fuel into the upper end of the combustion-chamber,l

-and water-pipes for the circulation of water inthe combustion-chamber which-cross the -combustiomchamber at dierent levels and which also incase the crossing pipes'and are` contracted inv area at the upper end of the combustion-chamber.

- 3.A furnace for burningfine fuel' comprising a combustion-chamber having a feedopening at the top, a grate at the bottom of 'the combustion-chamber,water-pipes crossing the combustion-chamber at different levels directly below the feed-opening and in different vertical planes in the combustionchamber, andv water-pipes 'surroundingthe crossing pipes which extend fromtop to bottom of the combustion-chamber.`

In testimony whereof I have hereunto subscribed my name.

RICHARD IIERZBERG.

Witnesses:

'FELIX RUCBURG,

ALAX BENING.

IOO 

